This unit contains devices with the help of which we enter data into computer. This unit makes link between user and computer. The input devices translate the information into the form understandable by computer.
They are used for accepting the data on which the operation are to be performed the most commonly used input devices among other are;
a) Keyboards b) mouse c) scanner
CPU (Central Processing Unit)
CPU is considered as the brain of the computer. CPU performs all types of data processing operations. It stores data, intermediate results and instructions(program). It controls the operation of all parts of computer.
CPU itself has following three components
- ALU(Arithmetic Logic Unit)
- Memory Unit
- Control Unit
Output unit consists of devices with the help of which we get the information from computer. This unit is a link between computer and users. Output devices translate the computer’s output into the form understandable by users.